{"product_id":"watch-craft-mainspring-3063w-for-as-735-unitas-190-cortebert-190-516-518-alloy","title":"WATCH-CRAFT Mainspring 3063W for AS 735, Unitas 190, Cortebert 190, 516, 518 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eWATCH-CRAFT \u003c\/strong\u003eMainspring 3063W for AS 735, Unitas 190, Cortebert 190, 516, 518 caliber movements plus perhaps similar ébauche watches, white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a satisfactory job of representing the item. \u003c\/span\u003e\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49074588680500,"sku":"PMS-CEM3063WA-04","price":7.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-03-3112.00.59.jpg?v=1774983862","url":"https:\/\/www.vintagetimeparts.com\/products\/watch-craft-mainspring-3063w-for-as-735-unitas-190-cortebert-190-516-518-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}